C++ DirAccess::list_dir_begin方法代码示例

bool PowerX11::GetPowerInfo_Linux_proc_acpi() {
	String node;
	DirAccess *dirp = DirAccess::create(DirAccess::ACCESS_FILESYSTEM);
	bool have_battery = false;
	bool have_ac = false;
	bool charging = false;

	this->nsecs_left = -1;
	this->percent_left = -1;
	this->power_state = OS::POWERSTATE_UNKNOWN;

	dirp->change_dir(proc_acpi_battery_path);
	Error err = dirp->list_dir_begin();

	if (err != OK) {
		return false; /* can't use this interface. */
	} else {
		node = dirp->get_next();
		while (node != "") {
			check_proc_acpi_battery(node.utf8().get_data(), &have_battery, &charging /*, seconds, percent*/);
			node = dirp->get_next();
		}
		memdelete(dirp);
	}

	dirp->change_dir(proc_acpi_ac_adapter_path);
	err = dirp->list_dir_begin();
	if (err != OK) {
		return false; /* can't use this interface. */
	} else {
		node = dirp->get_next();
		while (node != "") {
			check_proc_acpi_ac_adapter(node.utf8().get_data(), &have_ac);
			node = dirp->get_next();
		}
		memdelete(dirp);
	}

	if (!have_battery) {
		this->power_state = OS::POWERSTATE_NO_BATTERY;
	} else if (charging) {
		this->power_state = OS::POWERSTATE_CHARGING;
	} else if (have_ac) {
		this->power_state = OS::POWERSTATE_CHARGED;
	} else {
		this->power_state = OS::POWERSTATE_ON_BATTERY;
	}

	return true; /* definitive answer. */
}

void ExportTemplateManager::_uninstall_template_confirm() {

	DirAccess *d = DirAccess::create(DirAccess::ACCESS_FILESYSTEM);
	Error err = d->change_dir(EditorSettings::get_singleton()->get_templates_dir());

	ERR_FAIL_COND(err != OK);

	err = d->change_dir(to_remove);

	ERR_FAIL_COND(err != OK);

	Vector<String> files;

	d->list_dir_begin();

	bool isdir;
	String c = d->get_next(&isdir);
	while (c != String()) {
		if (!isdir) {
			files.push_back(c);
		}
		c = d->get_next(&isdir);
	}

	d->list_dir_end();

	for (int i = 0; i < files.size(); i++) {
		d->remove(files[i]);
	}

	d->change_dir("..");
	d->remove(to_remove);

	_update_template_list();
}

void FindInFiles::_scan_dir(String path, PoolStringArray &out_folders) {

	DirAccess *dir = DirAccess::open(path);
	if (dir == NULL) {
		print_line("Cannot open directory! " + path);
		return;
	}

	dir->list_dir_begin();

	for (int i = 0; i < 1000; ++i) {
		String file = dir->get_next();

		if (file == "")
			break;

		// Ignore special dirs and hidden dirs (such as .git and .import)
		if (file == "." || file == ".." || file.begins_with("."))
			continue;

		if (dir->current_is_dir())
			out_folders.append(file);

		else {
			String file_ext = file.get_extension();
			if (_extension_filter.has(file_ext)) {
				_files_to_scan.push_back(path.plus_file(file));
			}
		}
	}
}

void RotatedFileLogger::clear_old_backups() {
	int max_backups = max_files - 1; // -1 for the current file

	String basename = base_path.get_file().get_basename();
	String extension = "." + base_path.get_extension();

	DirAccess *da = DirAccess::open(base_path.get_base_dir());
	if (!da) {
		return;
	}

	da->list_dir_begin();
	String f = da->get_next();
	Set<String> backups;
	while (f != String()) {
		if (!da->current_is_dir() && f.begins_with(basename) && f.ends_with(extension) && f != base_path.get_file()) {
			backups.insert(f);
		}
		f = da->get_next();
	}
	da->list_dir_end();

	if (backups.size() > max_backups) {
		// since backups are appended with timestamp and Set iterates them in sorted order,
		// first backups are the oldest
		int to_delete = backups.size() - max_backups;
		for (Set<String>::Element *E = backups.front(); E && to_delete > 0; E = E->next(), --to_delete) {
			da->remove(E->get());
		}
	}

	memdelete(da);
}

MainLoop *test() {

	print_line("this is test io");
	DirAccess *da = DirAccess::create(DirAccess::ACCESS_FILESYSTEM);
	da->change_dir(".");
	print_line("Opening current dir " + da->get_current_dir());
	String entry;
	da->list_dir_begin();
	while ((entry = da->get_next()) != "") {

		print_line("entry " + entry + " is dir: " + Variant(da->current_is_dir()));
	};
	da->list_dir_end();

	RES texture = ResourceLoader::load("test_data/rock.png");
	ERR_FAIL_COND_V(texture.is_null(), NULL);

	ResourceSaver::save("test_data/rock.xml", texture);

	print_line("localize paths");
	print_line(ProjectSettings::get_singleton()->localize_path("algo.xml"));
	print_line(ProjectSettings::get_singleton()->localize_path("c:\\windows\\algo.xml"));
	print_line(ProjectSettings::get_singleton()->localize_path(ProjectSettings::get_singleton()->get_resource_path() + "/something/something.xml"));
	print_line(ProjectSettings::get_singleton()->localize_path("somedir/algo.xml"));

	{

		FileAccess *z = FileAccess::open("test_data/archive.zip", FileAccess::READ);
		int len = z->get_len();
		Vector<uint8_t> zip;
		zip.resize(len);
		z->get_buffer(&zip[0], len);
		z->close();
		memdelete(z);

		FileAccessMemory::register_file("a_package", zip);
		FileAccess::make_default<FileAccessMemory>(FileAccess::ACCESS_RESOURCES);
		FileAccess::make_default<FileAccessMemory>(FileAccess::ACCESS_FILESYSTEM);
		FileAccess::make_default<FileAccessMemory>(FileAccess::ACCESS_USERDATA);

		print_line("archive test");
	};

	print_line("test done");

	return memnew(TestMainLoop);
}

void ProjectManager::_files_dropped(StringArray p_files, int p_screen) {
	Set<String> folders_set;
	DirAccess *da = DirAccess::create(DirAccess::ACCESS_FILESYSTEM);
	for (int i = 0; i < p_files.size(); i++) {
		String file = p_files[i];
		folders_set.insert(da->dir_exists(file) ? file : file.get_base_dir());
	}
	memdelete(da);
	if (folders_set.size()>0) {
		StringArray folders;
		for (Set<String>::Element *E=folders_set.front();E;E=E->next()) {
			folders.append(E->get());
		}

		bool confirm = true;
		if (folders.size()==1) {
			DirAccess *dir = DirAccess::create(DirAccess::ACCESS_FILESYSTEM);
			if (dir->change_dir(folders[0])==OK) {
				dir->list_dir_begin();
				String file = dir->get_next();
				while(confirm && file!=String()) {
					if (!da->current_is_dir() && file.ends_with("engine.cfg")) {
						confirm = false;
					}
					file = dir->get_next();
				}
				dir->list_dir_end();
			}
			memdelete(dir);
		}
		if (confirm) {
			multi_scan_ask->get_ok()->disconnect("pressed", this, "_scan_multiple_folders");
			multi_scan_ask->get_ok()->connect("pressed", this, "_scan_multiple_folders", varray(folders));
			multi_scan_ask->set_text(vformat(TTR("You are about the scan %s folders for existing Godot projects. Do you confirm?"), folders.size()));
			multi_scan_ask->popup_centered_minsize();
		} else {
			_scan_multiple_folders(folders);
		}
	}
}

void ExportTemplateManager::_update_template_list() {

	while (current_hb->get_child_count()) {
		memdelete(current_hb->get_child(0));
	}

	while (installed_vb->get_child_count()) {
		memdelete(installed_vb->get_child(0));
	}

	DirAccess *d = DirAccess::create(DirAccess::ACCESS_FILESYSTEM);
	Error err = d->change_dir(EditorSettings::get_singleton()->get_templates_dir());

	d->list_dir_begin();
	Set<String> templates;

	if (err == OK) {

		bool isdir;
		String c = d->get_next(&isdir);
		while (c != String()) {
			if (isdir && !c.begins_with(".")) {
				templates.insert(c);
			}
			c = d->get_next(&isdir);
		}
	}
	d->list_dir_end();

	memdelete(d);

	String current_version = VERSION_FULL_CONFIG;

	Label *current = memnew(Label);
	current->set_h_size_flags(SIZE_EXPAND_FILL);
	current_hb->add_child(current);

	if (templates.has(current_version)) {
		current->add_color_override("font_color", get_color("success_color", "Editor"));
		Button *redownload = memnew(Button);
		redownload->set_text(TTR("Re-Download"));
		current_hb->add_child(redownload);
		redownload->connect("pressed", this, "_download_template", varray(current_version));

		Button *uninstall = memnew(Button);
		uninstall->set_text(TTR("Uninstall"));
		current_hb->add_child(uninstall);
		current->set_text(current_version + " " + TTR("(Installed)"));
		uninstall->connect("pressed", this, "_uninstall_template", varray(current_version));

	} else {
		current->add_color_override("font_color", get_color("error_color", "Editor"));
		Button *redownload = memnew(Button);
		redownload->set_text(TTR("Download"));
		redownload->connect("pressed", this, "_download_template", varray(current_version));
		current_hb->add_child(redownload);
		current->set_text(current_version + " " + TTR("(Missing)"));
	}

	for (Set<String>::Element *E = templates.back(); E; E = E->prev()) {

		HBoxContainer *hbc = memnew(HBoxContainer);
		Label *version = memnew(Label);
		version->set_modulate(get_color("disabled_font_color", "Editor"));
		String text = E->get();
		if (text == current_version) {
			text += " " + TTR("(Current)");
		}
		version->set_text(text);
		version->set_h_size_flags(SIZE_EXPAND_FILL);
		hbc->add_child(version);

		Button *uninstall = memnew(Button);

		uninstall->set_text(TTR("Uninstall"));
		hbc->add_child(uninstall);
		uninstall->connect("pressed", this, "_uninstall_template", varray(E->get()));

		installed_vb->add_child(hbc);
	}
}

MainLoop* test() {

	print_line("this is test io");
	DirAccess* da = DirAccess::create(DirAccess::ACCESS_FILESYSTEM);
	da->change_dir(".");
	print_line("Opening current dir "+ da->get_current_dir());
	String entry;
	da->list_dir_begin();
	while ( (entry = da->get_next()) != "") {

		print_line("entry "+entry+" is dir: " + Variant(da->current_is_dir()));
	};
	da->list_dir_end();

	RES texture = ResourceLoader::load("test_data/rock.png");
	ERR_FAIL_COND_V(texture.is_null(), NULL);

	ResourceSaver::save("test_data/rock.xml",texture);

	print_line("localize paths");
	print_line(Globals::get_singleton()->localize_path("algo.xml"));
	print_line(Globals::get_singleton()->localize_path("c:\\windows\\algo.xml"));
	print_line(Globals::get_singleton()->localize_path(Globals::get_singleton()->get_resource_path()+"/something/something.xml"));
	print_line(Globals::get_singleton()->localize_path("somedir/algo.xml"));

	{

		FileAccess* z = FileAccess::open("test_data/archive.zip", FileAccess::READ);
		int len = z->get_len();
		Vector<uint8_t> zip;
		zip.resize(len);
		z->get_buffer(&zip[0], len);
		z->close();
		memdelete(z);

		FileAccessMemory::register_file("a_package", zip);
		FileAccess::make_default<FileAccessMemory>(FileAccess::ACCESS_RESOURCES);
		FileAccess::make_default<FileAccessMemory>(FileAccess::ACCESS_FILESYSTEM);
		FileAccess::make_default<FileAccessMemory>(FileAccess::ACCESS_USERDATA);

		print_line("archive test");
#if 0
		Archive arch;

		Archive::get_singleton()->add_package("a_package");
		FileAccessArchive f;

		print_line("opening for read");
		f._open("file.txt", FileAccess::READ);
		int pos = f.get_pos();
		printf("file has %i bytes, initial pos %i\n", (int)f.get_len(), pos);

		do {
			printf("%c", f.get_8());

		} while (!f.eof_reached());

		print_line("opening for stored seek");
		f.open("seek.bin", FileAccess::READ);
		pos = f.get_pos();
		printf("byte at pos %i is %i\n", pos, (int)f.get_8());
		f.seek(128);
		pos = f.get_pos();
		printf("byte at pos %i is %i\n", pos, (int)f.get_8());

		print_line("opening for deflated seek");
		f.open("seek_deflated.bin", FileAccess::READ);
		pos = f.get_pos();
		printf("byte at pos %i is %i\n", pos, (int)f.get_8());
		f.seek(128);
		pos = f.get_pos();
		printf("byte at pos %i is %i\n", pos, (int)f.get_8());
		pos = f.get_pos();
		printf("byte at pos %i is %i\n", pos, (int)f.get_8());
		pos = f.get_pos();
		printf("byte at pos %i is %i\n", pos, (int)f.get_8());
		f.seek(256);
		pos = f.get_pos();
		printf("byte at pos %i is %i\n", pos, (int)f.get_8());
		pos = f.get_pos();
		printf("byte at pos %i is %i\n", pos, (int)f.get_8());
		pos = f.get_pos();
		printf("byte at pos %i is %i\n", pos, (int)f.get_8());
		f.seek(4);
		pos = f.get_pos();
		printf("byte at pos %i is %i\n", pos, (int)f.get_8());
		pos = f.get_pos();
		printf("byte at pos %i is %i\n", pos, (int)f.get_8());
		pos = f.get_pos();
		printf("byte at pos %i is %i\n", pos, (int)f.get_8());

		f.close();

		DirAccessArchive d;
		String dir = "../blah1/blah2/blahask/../blah3/.//blah4/";
		printf("changing dir to %s\n", dir.utf8().get_data());
		d.change_dir(dir);
		printf("current dir is %s\n", d.get_current_dir().utf8().get_data());

		FileAccessMemory::cleanup();
//.........这里部分代码省略.........

void EditorPluginSettings::update_plugins() {


	plugin_list->clear();

	DirAccess *da = DirAccess::create(DirAccess::ACCESS_RESOURCES);
	Error err = da->change_dir("res://addons");
	if (err!=OK) {
		memdelete(da);
		return;
	}

	updating=true;

	TreeItem *root = plugin_list->create_item();

	da->list_dir_begin();

	String d = da->get_next();

	Vector<String> plugins;

	while(d!=String()) {

		bool dir = da->current_is_dir();
		String path = "res://addons/"+d+"/plugin.cfg";

		if (dir && FileAccess::exists(path)) {

			plugins.push_back(d);
		}

		d = da->get_next();
	}

	da->list_dir_end();
	memdelete(da);

	plugins.sort();

	Vector<String> active_plugins = GlobalConfig::get_singleton()->get("plugins/active");

	for(int i=0;i<plugins.size();i++) {

		Ref<ConfigFile> cf;
		cf.instance();
		String path = "res://addons/"+plugins[i]+"/plugin.cfg";

		Error err = cf->load(path);

		if (err!=OK) {
			WARN_PRINTS("Can't load plugin config: "+path);
		} else if (!cf->has_section_key("plugin","name")) {
			WARN_PRINTS("Plugin misses plugin/name: "+path);
		} else if (!cf->has_section_key("plugin","author")) {
			WARN_PRINTS("Plugin misses plugin/author: "+path);
		} else if (!cf->has_section_key("plugin","version")) {
			WARN_PRINTS("Plugin misses plugin/version: "+path);
		} else if (!cf->has_section_key("plugin","description")) {
			WARN_PRINTS("Plugin misses plugin/description: "+path);
		} else if (!cf->has_section_key("plugin","script")) {
			WARN_PRINTS("Plugin misses plugin/script: "+path);
		} else {

			String d = plugins[i];
			String name = cf->get_value("plugin","name");
			String author = cf->get_value("plugin","author");
			String version = cf->get_value("plugin","version");
			String description = cf->get_value("plugin","description");
			String script = cf->get_value("plugin","script");

			TreeItem *item = plugin_list->create_item(root);
			item->set_text(0,name);
			item->set_tooltip(0,"Name: "+name+"\nPath: "+path+"\nMain Script: "+script);
			item->set_metadata(0,d);
			item->set_text(1,version);
			item->set_metadata(1,script);
			item->set_text(2,author);
			item->set_metadata(2,description);
			item->set_cell_mode(3,TreeItem::CELL_MODE_RANGE);
			item->set_range_config(3,0,1,1);
			item->set_text(3,"Inactive,Active");
			item->set_editable(3,true);

			if (EditorNode::get_singleton()->is_addon_plugin_enabled(d)) {
				item->set_custom_color(3,Color(0.2,1,0.2));
				item->set_range(3,1);
			} else {
				item->set_custom_color(3,Color(1,0.2,0.2));
				item->set_range(3,0);
			}
		}

	}

	updating=false;

}

void EditorFileSystem::_scan_fs_changes(EditorFileSystemDirectory *p_dir,const ScanProgress& p_progress) {

	uint64_t current_mtime = FileAccess::get_modified_time(p_dir->get_path());

	bool updated_dir=false;

	//print_line("dir: "+p_dir->get_path()+" MODTIME: "+itos(p_dir->modified_time)+" CTIME: "+itos(current_mtime));

	if (current_mtime!=p_dir->modified_time) {

		updated_dir=true;
		p_dir->modified_time=current_mtime;
		//ooooops, dir changed, see what's going on

		//first mark everything as veryfied

		for(int i=0;i<p_dir->files.size();i++) {

			p_dir->files[i]->verified=false;
		}

		for(int i=0;i<p_dir->subdirs.size();i++) {

			p_dir->get_subdir(i)->verified=false;
		}

		//then scan files and directories and check what's different

		DirAccess *da = DirAccess::create(DirAccess::ACCESS_RESOURCES);
		String cd = p_dir->get_path();
		da->change_dir(cd);
		da->list_dir_begin();
		while (true) {

			bool isdir;
			String f = da->get_next(&isdir);
			if (f=="")
				break;

			if (isdir) {

				if (f.begins_with(".")) //ignore hidden and . / ..
					continue;

				int idx = p_dir->find_dir_index(f);
				if (idx==-1) {

					if (FileAccess::exists(cd.plus_file(f).plus_file("engine.cfg"))) // skip if another project inside this
						continue;

					EditorFileSystemDirectory *efd = memnew( EditorFileSystemDirectory );

					efd->parent=p_dir;
					efd->name=f;
					DirAccess *d = DirAccess::create(DirAccess::ACCESS_RESOURCES);
					d->change_dir(cd.plus_file(f));
					_scan_new_dir(efd,d,p_progress.get_sub(1,1));
					memdelete(d);


					ItemAction ia;
					ia.action=ItemAction::ACTION_DIR_ADD;
					ia.dir=p_dir;
					ia.file=f;
					ia.new_dir=efd;
					scan_actions.push_back(ia);
				} else {
					p_dir->subdirs[idx]->verified=true;
				}


			} else {
				String ext = f.extension().to_lower();
				if (!valid_extensions.has(ext))
					continue; //invalid

				int idx = p_dir->find_file_index(f);

				if (idx==-1) {
					//never seen this file, add actition to add it
					EditorFileSystemDirectory::FileInfo *fi = memnew( EditorFileSystemDirectory::FileInfo );
					fi->file=f;

					String path = cd.plus_file(fi->file);
					fi->modified_time=FileAccess::get_modified_time(path);
					fi->meta=_get_meta(path);
					fi->type=ResourceLoader::get_resource_type(path);

					{
						ItemAction ia;
						ia.action=ItemAction::ACTION_FILE_ADD;
						ia.dir=p_dir;
						ia.file=f;
						ia.new_file=fi;
						scan_actions.push_back(ia);
					}

					//take the chance and scan sources
					if (_check_meta_sources(fi->meta)) {

//.........这里部分代码省略.........

void EditorFileSystem::_scan_fs_changes(EditorFileSystemDirectory *p_dir, const ScanProgress &p_progress) {

	uint64_t current_mtime = FileAccess::get_modified_time(p_dir->get_path());

	bool updated_dir = false;
	String cd = p_dir->get_path();

	//print_line("dir: "+p_dir->get_path()+" MODTIME: "+itos(p_dir->modified_time)+" CTIME: "+itos(current_mtime));

	if (current_mtime != p_dir->modified_time) {

		updated_dir = true;
		p_dir->modified_time = current_mtime;
		//ooooops, dir changed, see what's going on

		//first mark everything as veryfied

		for (int i = 0; i < p_dir->files.size(); i++) {

			p_dir->files[i]->verified = false;
		}

		for (int i = 0; i < p_dir->subdirs.size(); i++) {

			p_dir->get_subdir(i)->verified = false;
		}

		//then scan files and directories and check what's different

		DirAccess *da = DirAccess::create(DirAccess::ACCESS_RESOURCES);

		da->change_dir(cd);
		da->list_dir_begin();
		while (true) {

			bool isdir;
			String f = da->get_next(&isdir);
			if (f == "")
				break;

			if (isdir) {

				if (f.begins_with(".")) //ignore hidden and . / ..
					continue;

				int idx = p_dir->find_dir_index(f);
				if (idx == -1) {

					if (FileAccess::exists(cd.plus_file(f).plus_file("project.godot"))) // skip if another project inside this
						continue;
					if (FileAccess::exists(cd.plus_file(f).plus_file(".gdignore"))) // skip if another project inside this
						continue;

					EditorFileSystemDirectory *efd = memnew(EditorFileSystemDirectory);

					efd->parent = p_dir;
					efd->name = f;
					DirAccess *d = DirAccess::create(DirAccess::ACCESS_RESOURCES);
					d->change_dir(cd.plus_file(f));
					_scan_new_dir(efd, d, p_progress.get_sub(1, 1));
					memdelete(d);

					ItemAction ia;
					ia.action = ItemAction::ACTION_DIR_ADD;
					ia.dir = p_dir;
					ia.file = f;
					ia.new_dir = efd;
					scan_actions.push_back(ia);
				} else {
					p_dir->subdirs[idx]->verified = true;
				}

			} else {
				String ext = f.get_extension().to_lower();
				if (!valid_extensions.has(ext))
					continue; //invalid

				int idx = p_dir->find_file_index(f);

				if (idx == -1) {
					//never seen this file, add actition to add it
					EditorFileSystemDirectory::FileInfo *fi = memnew(EditorFileSystemDirectory::FileInfo);
					fi->file = f;

					String path = cd.plus_file(fi->file);
					fi->modified_time = FileAccess::get_modified_time(path);
					fi->import_modified_time = 0;
					fi->type = ResourceLoader::get_resource_type(path);

					{
						ItemAction ia;
						ia.action = ItemAction::ACTION_FILE_ADD;
						ia.dir = p_dir;
						ia.file = f;
						ia.new_file = fi;
						scan_actions.push_back(ia);
					}

					if (import_extensions.has(ext)) {
						//if it can be imported, and it was added, it needs to be reimported
//.........这里部分代码省略.........